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Þ'¯°ÌME[YéïĵÂCå½ Ué©Áû'Ê9%eÔðNU”ë‘ÌsD3/®+UI˜9h.WC”빓$#:pz:YÓ ¿xž* ³$Í +$kñAŠ‹†¢ Uê>¸)_š¬÷©ßAÂÔb9ÇU ¯¾á•9¯ÏÏ÷O÷¼¼Fähal1‰3Ì[Ïr•´UCksNÐ] R‘¸¥H+§Šé†c©vÖÞ0iÓ76s†î!§=ß ¼~Ô'°Ãmäoäš³ªøi1úÉ)³yV8 CLÄØÁ‘WYïi€H6ÖÑiámø^ÈY´°Ñ7¥Û*—Ñ©L«Qƒï—Ùrÿ ›£Ð*š¸ˆL©ˆ$ˆ ÷¾D§9È®«qbqC)–ˆïv´çñsÑVT­Ø, <àïºÀO«Jý·õ àfPìð .wFšir´þ’2_Y *Æ€x\« ì€9š@ Ž|F⇥ˆkZ@hÖÄ0t¿-<“‹qµ¾*ZL¤Ú)&BJpÓF5=$„at*Zš$’ÑtdûÝRI1 2Ž‰$€$I$#‰SÞ’Hë¬ï;Á$¡t$’`<(ñÇt)$‡Ð.Êf¢X’Kt=Éé$‚ˆªè¢oÝëòI%Rgcª÷ŠyI%¡‰ÿ !ñ)´õ $¤ Ô’IIGÿÙ# This file is dual licensed under the terms of the Apache License, Version # 2.0, and the BSD License. See the LICENSE file in the root of this repository # for complete details. import abc import datetime import typing from cryptography import utils from cryptography import x509 from cryptography.hazmat.bindings._rust import ocsp from cryptography.hazmat.primitives import hashes, serialization from cryptography.hazmat.primitives.asymmetric.types import ( CERTIFICATE_PRIVATE_KEY_TYPES, ) from cryptography.x509.base import ( _EARLIEST_UTC_TIME, _convert_to_naive_utc_time, _reject_duplicate_extension, ) class OCSPResponderEncoding(utils.Enum): HASH = "By Hash" NAME = "By Name" class OCSPResponseStatus(utils.Enum): SUCCESSFUL = 0 MALFORMED_REQUEST = 1 INTERNAL_ERROR = 2 TRY_LATER = 3 SIG_REQUIRED = 5 UNAUTHORIZED = 6 _ALLOWED_HASHES = ( hashes.SHA1, hashes.SHA224, hashes.SHA256, hashes.SHA384, hashes.SHA512, ) def _verify_algorithm(algorithm: hashes.HashAlgorithm) -> None: if not isinstance(algorithm, _ALLOWED_HASHES): raise ValueError( "Algorithm must be SHA1, SHA224, SHA256, SHA384, or SHA512" ) class OCSPCertStatus(utils.Enum): GOOD = 0 REVOKED = 1 UNKNOWN = 2 class _SingleResponse: def __init__( self, cert: x509.Certificate, issuer: x509.Certificate, algorithm: hashes.HashAlgorithm, cert_status: OCSPCertStatus, this_update: datetime.datetime, next_update: typing.Optional[datetime.datetime], revocation_time: typing.Optional[datetime.datetime], revocation_reason: typing.Optional[x509.ReasonFlags], ): if not isinstance(cert, x509.Certificate) or not isinstance( issuer, x509.Certificate ): raise TypeError("cert and issuer must be a Certificate") _verify_algorithm(algorithm) if not isinstance(this_update, datetime.datetime): raise TypeError("this_update must be a datetime object") if next_update is not None and not isinstance( next_update, datetime.datetime ): raise TypeError("next_update must be a datetime object or None") self._cert = cert self._issuer = issuer self._algorithm = algorithm self._this_update = this_update self._next_update = next_update if not isinstance(cert_status, OCSPCertStatus): raise TypeError( "cert_status must be an item from the OCSPCertStatus enum" ) if cert_status is not OCSPCertStatus.REVOKED: if revocation_time is not None: raise ValueError( "revocation_time can only be provided if the certificate " "is revoked" ) if revocation_reason is not None: raise ValueError( "revocation_reason can only be provided if the certificate" " is revoked" ) else: if not isinstance(revocation_time, datetime.datetime): raise TypeError("revocation_time must be a datetime object") revocation_time = _convert_to_naive_utc_time(revocation_time) if revocation_time < _EARLIEST_UTC_TIME: raise ValueError( "The revocation_time must be on or after" " 1950 January 1." ) if revocation_reason is not None and not isinstance( revocation_reason, x509.ReasonFlags ): raise TypeError( "revocation_reason must be an item from the ReasonFlags " "enum or None" ) self._cert_status = cert_status self._revocation_time = revocation_time self._revocation_reason = revocation_reason class OCSPRequest(metaclass=abc.ABCMeta): @abc.abstractproperty def issuer_key_hash(self) -> bytes: """ The hash of the issuer public key """ @abc.abstractproperty def issuer_name_hash(self) -> bytes: """ The hash of the issuer name """ @abc.abstractproperty def hash_algorithm(self) -> hashes.HashAlgorithm: """ The hash algorithm used in the issuer name and key hashes """ @abc.abstractproperty def serial_number(self) -> int: """ The serial number of the cert whose status is being checked """ @abc.abstractmethod def public_bytes(self, encoding: serialization.Encoding) -> bytes: """ Serializes the request to DER """ @abc.abstractproperty def extensions(self) -> x509.Extensions: """ The list of request extensions. Not single request extensions. """ class OCSPSingleResponse(metaclass=abc.ABCMeta): @abc.abstractproperty def certificate_status(self) -> OCSPCertStatus: """ The status of the certificate (an element from the OCSPCertStatus enum) """ @abc.abstractproperty def revocation_time(self) -> typing.Optional[datetime.datetime]: """ The date of when the certificate was revoked or None if not revoked. """ @abc.abstractproperty def revocation_reason(self) -> typing.Optional[x509.ReasonFlags]: """ The reason the certificate was revoked or None if not specified or not revoked. """ @abc.abstractproperty def this_update(self) -> datetime.datetime: """ The most recent time at which the status being indicated is known by the responder to have been correct """ @abc.abstractproperty def next_update(self) -> typing.Optional[datetime.datetime]: """ The time when newer information will be available """ @abc.abstractproperty def issuer_key_hash(self) -> bytes: """ The hash of the issuer public key """ @abc.abstractproperty def issuer_name_hash(self) -> bytes: """ The hash of the issuer name """ @abc.abstractproperty def hash_algorithm(self) -> hashes.HashAlgorithm: """ The hash algorithm used in the issuer name and key hashes """ @abc.abstractproperty def serial_number(self) -> int: """ The serial number of the cert whose status is being checked """ class OCSPResponse(metaclass=abc.ABCMeta): @abc.abstractproperty def responses(self) -> typing.Iterator[OCSPSingleResponse]: """ An iterator over the individual SINGLERESP structures in the response """ @abc.abstractproperty def response_status(self) -> OCSPResponseStatus: """ The status of the response. This is a value from the OCSPResponseStatus enumeration """ @abc.abstractproperty def signature_algorithm_oid(self) -> x509.ObjectIdentifier: """ The ObjectIdentifier of the signature algorithm """ @abc.abstractproperty def signature_hash_algorithm( self, ) -> typing.Optional[hashes.HashAlgorithm]: """ Returns a HashAlgorithm corresponding to the type of the digest signed """ @abc.abstractproperty def signature(self) -> bytes: """ The signature bytes """ @abc.abstractproperty def tbs_response_bytes(self) -> bytes: """ The tbsResponseData bytes """ @abc.abstractproperty def certificates(self) -> typing.List[x509.Certificate]: """ A list of certificates used to help build a chain to verify the OCSP response. This situation occurs when the OCSP responder uses a delegate certificate. """ @abc.abstractproperty def responder_key_hash(self) -> typing.Optional[bytes]: """ The responder's key hash or None """ @abc.abstractproperty def responder_name(self) -> typing.Optional[x509.Name]: """ The responder's Name or None """ @abc.abstractproperty def produced_at(self) -> datetime.datetime: """ The time the response was produced """ @abc.abstractproperty def certificate_status(self) -> OCSPCertStatus: """ The status of the certificate (an element from the OCSPCertStatus enum) """ @abc.abstractproperty def revocation_time(self) -> typing.Optional[datetime.datetime]: """ The date of when the certificate was revoked or None if not revoked. """ @abc.abstractproperty def revocation_reason(self) -> typing.Optional[x509.ReasonFlags]: """ The reason the certificate was revoked or None if not specified or not revoked. """ @abc.abstractproperty def this_update(self) -> datetime.datetime: """ The most recent time at which the status being indicated is known by the responder to have been correct """ @abc.abstractproperty def next_update(self) -> typing.Optional[datetime.datetime]: """ The time when newer information will be available """ @abc.abstractproperty def issuer_key_hash(self) -> bytes: """ The hash of the issuer public key """ @abc.abstractproperty def issuer_name_hash(self) -> bytes: """ The hash of the issuer name """ @abc.abstractproperty def hash_algorithm(self) -> hashes.HashAlgorithm: """ The hash algorithm used in the issuer name and key hashes """ @abc.abstractproperty def serial_number(self) -> int: """ The serial number of the cert whose status is being checked """ @abc.abstractproperty def extensions(self) -> x509.Extensions: """ The list of response extensions. Not single response extensions. """ @abc.abstractproperty def single_extensions(self) -> x509.Extensions: """ The list of single response extensions. Not response extensions. """ @abc.abstractmethod def public_bytes(self, encoding: serialization.Encoding) -> bytes: """ Serializes the response to DER """ class OCSPRequestBuilder: def __init__( self, request: typing.Optional[ typing.Tuple[ x509.Certificate, x509.Certificate, hashes.HashAlgorithm ] ] = None, extensions: typing.List[x509.Extension[x509.ExtensionType]] = [], ) -> None: self._request = request self._extensions = extensions def add_certificate( self, cert: x509.Certificate, issuer: x509.Certificate, algorithm: hashes.HashAlgorithm, ) -> "OCSPRequestBuilder": if self._request is not None: raise ValueError("Only one certificate can be added to a request") _verify_algorithm(algorithm) if not isinstance(cert, x509.Certificate) or not isinstance( issuer, x509.Certificate ): raise TypeError("cert and issuer must be a Certificate") return OCSPRequestBuilder((cert, issuer, algorithm), self._extensions) def add_extension( self, extval: x509.ExtensionType, critical: bool ) -> "OCSPRequestBuilder": if not isinstance(extval, x509.ExtensionType): raise TypeError("extension must be an ExtensionType") extension = x509.Extension(extval.oid, critical, extval) _reject_duplicate_extension(extension, self._extensions) return OCSPRequestBuilder( self._request, self._extensions + [extension] ) def build(self) -> OCSPRequest: if self._request is None: raise ValueError("You must add a certificate before building") return ocsp.create_ocsp_request(self) class OCSPResponseBuilder: def __init__( self, response: typing.Optional[_SingleResponse] = None, responder_id: typing.Optional[ typing.Tuple[x509.Certificate, OCSPResponderEncoding] ] = None, certs: typing.Optional[typing.List[x509.Certificate]] = None, extensions: typing.List[x509.Extension[x509.ExtensionType]] = [], ): self._response = response self._responder_id = responder_id self._certs = certs self._extensions = extensions def add_response( self, cert: x509.Certificate, issuer: x509.Certificate, algorithm: hashes.HashAlgorithm, cert_status: OCSPCertStatus, this_update: datetime.datetime, next_update: typing.Optional[datetime.datetime], revocation_time: typing.Optional[datetime.datetime], revocation_reason: typing.Optional[x509.ReasonFlags], ) -> "OCSPResponseBuilder": if self._response is not None: raise ValueError("Only one response per OCSPResponse.") singleresp = _SingleResponse( cert, issuer, algorithm, cert_status, this_update, next_update, revocation_time, revocation_reason, ) return OCSPResponseBuilder( singleresp, self._responder_id, self._certs, self._extensions, ) def responder_id( self, encoding: OCSPResponderEncoding, responder_cert: x509.Certificate ) -> "OCSPResponseBuilder": if self._responder_id is not None: raise ValueError("responder_id can only be set once") if not isinstance(responder_cert, x509.Certificate): raise TypeError("responder_cert must be a Certificate") if not isinstance(encoding, OCSPResponderEncoding): raise TypeError( "encoding must be an element from OCSPResponderEncoding" ) return OCSPResponseBuilder( self._response, (responder_cert, encoding), self._certs, self._extensions, ) def certificates( self, certs: typing.Iterable[x509.Certificate] ) -> "OCSPResponseBuilder": if self._certs is not None: raise ValueError("certificates may only be set once") certs = list(certs) if len(certs) == 0: raise ValueError("certs must not be an empty list") if not all(isinstance(x, x509.Certificate) for x in certs): raise TypeError("certs must be a list of Certificates") return OCSPResponseBuilder( self._response, self._responder_id, certs, self._extensions, ) def add_extension( self, extval: x509.ExtensionType, critical: bool ) -> "OCSPResponseBuilder": if not isinstance(extval, x509.ExtensionType): raise TypeError("extension must be an ExtensionType") extension = x509.Extension(extval.oid, critical, extval) _reject_duplicate_extension(extension, self._extensions) return OCSPResponseBuilder( self._response, self._responder_id, self._certs, self._extensions + [extension], ) def sign( self, private_key: CERTIFICATE_PRIVATE_KEY_TYPES, algorithm: typing.Optional[hashes.HashAlgorithm], ) -> OCSPResponse: if self._response is None: raise ValueError("You must add a response before signing") if self._responder_id is None: raise ValueError("You must add a responder_id before signing") return ocsp.create_ocsp_response( OCSPResponseStatus.SUCCESSFUL, self, private_key, algorithm ) @classmethod def build_unsuccessful( cls, response_status: OCSPResponseStatus ) -> OCSPResponse: if not isinstance(response_status, OCSPResponseStatus): raise TypeError( "response_status must be an item from OCSPResponseStatus" ) if response_status is OCSPResponseStatus.SUCCESSFUL: raise ValueError("response_status cannot be SUCCESSFUL") return ocsp.create_ocsp_response(response_status, None, None, None) def load_der_ocsp_request(data: bytes) -> OCSPRequest: return ocsp.load_der_ocsp_request(data) def load_der_ocsp_response(data: bytes) -> OCSPResponse: return ocsp.load_der_ocsp_response(data)